Re: GECKOS 201

Dave:

Sorry I insist.

I can't find a capacitor that big here in Monterrey, Mexico.
I'm running another machine with 3 4amp motors, with a 36 volts 10
amp Microkinetics Power Supply which has a 50 volts 6800 uF
capacitor, and it's running for more than a year very smooth, with no
problem.
I can't use this power supply to run 4 4amp motors so I have to make
my own Power supply.
I found a 63 volts 10,000amp capacitor and I don't know if can do the
job as well as the microkinetics Power Supply.

Regards

Raul Lara

--- In CAD_CAM_EDM_DRO@y..., "turbulatordude" <davemucha@j...> wrote:
> Hi Raul,
>
> You mentioned 4 motors, 4 amps each.
>
> the post you quoted listed 7,500uF per motor, you have either 3 or
4
> motors so multiply 7,500 times # of motors for the 48V power supply.
>
> the correct formula is as I listed and that would wind up with
> 36 volt supply = 8,889uF
> 48v = 6,667uF
>
> Get the next larger cap, I assume Mariss posted 7,500 as it is a
> standard size.
>
> Like I said, check the Gecko paper and the calculation.
>
> Dave
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "ralaco" <ralaco@y...> wrote:
> > Dave:
> > Why do you talk about 4 times the amp in the formulation.
> >
> > Masriss posted:
> > If you are running 3 of these motors, the maximum current draw
from
> > the supply will be 4.5A (3 times 4.5A / 3 for series wired).
Using
> > 80,000 times 4.5A / 48V yields 7,500uF. Go with anything between
> that
> > and 15,000uF. At 48VDC, use a 63V
> >
> > Raul Lara
> >
> > --- In CAD_CAM_EDM_DRO@y..., "turbulatordude" <davemucha@j...>
> wrote:
> > > Hi Raul,
> > >
> > > yes, it is that simple, or even simplier.
> > >
> > > you only need to meet 66% of the total amps. Check out the
tech
> > > sheets at geckodrive.com. There is one on steppers and power
> > > supplies. pretty much says it all.
> > >
> > > but, to check your capacitor selection, I think you need more
> like
> > > 40,000uF for the total motors. (OK, 35,566uF)
> > >
> > > From the geckodrive site and posted on this list a few times;
> > > "(C= (80,000 * I) / V)). C is the value in microfarads."
> > >
> > > Dave
> > >
> > >
> > > --- In CAD_CAM_EDM_DRO@y..., "ralaco" <ralaco@y...> wrote:
> > > > The power supply to run 4 4amp stepper motors with Geckos 201.
> > > > Can it be made with a 36 volts 16 amp transformer, a bridge
> > > rectifier
> > > > and the same 10,000uF 63VDC capacitor?
> > > >
> > > > Raul Lara